One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,12,13)(11,14,15,16)(17,18,24,27,23,28,21,30)(19,22,20,26,29,25,31,32)(1,3,4,7)(2,5,6,8)(10,13)(11,15)(17,19)(18,25)(20,24)(21,31)(22,28)(23,29)(26,30)(27,32)(2,6)(5,8)(17,20)(18,26)(19,21)(22,30)(23,31)(24,29)(25,27)(28,32) involution — undirected(9,11,12,15)(10,14,13,16)(17,21,23,24)(18,27,28,30)(19,20,29,31)(22,32,25,26)(10,13)(14,16)(17,22,21,32,23,25,24,26)(18,20,30,19,28,31,27,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.